One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,7)(3,5,9,13)(4,8,11,14)(10,12,15,16)(17,18)(19,20)(21,29)(22,23)(24,27)(25,31)(26,30)(28,32)(33,34,38,40)(35,36,42,44)(37,39,47,46)(41,43,45,48)(4,11)(8,14)(10,15)(12,16)(18,23)(20,24)(25,29)(28,30)(33,35)(34,36)(37,45)(38,42)(39,48)(40,44)(41,47)(43,46) involution — undirected(2,7)(3,9)(8,14)(10,15)(17,19,22,27)(18,24,23,20)(21,26,31,32)(25,30,29,28)(33,36,38,44)(34,35,40,42)(37,43,47,48)(39,41,46,45)(1,3)(2,5)(4,10)(6,9)(7,13)(8,12)(11,15)(14,16)(17,19)(18,20)(21,26)(22,27)(23,24)(25,28)(29,30)(31,32)(33,36)(34,35)(37,43)(38,44)(39,41)(40,42)(45,46)(47,48) involution — undirected(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,20)(18,19)(21,30)(22,24)(23,27)(25,32)(26,29)(28,31)(33,37)(34,39)(35,41)(36,43)(38,47)(40,46)(42,45)(44,48) involution — undirected(1,5)(2,3)(4,12)(6,13)(7,9)(8,10)(11,16)(14,15)(17,21,22,31)(18,25,23,29)(19,26,27,32)(20,28,24,30)(33,34)(35,36)(37,46)(38,40)(39,47)(41,48)(42,44)(43,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.