One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,11,9)(4,12,13,8)(10,15,16,14)(17,18,22,23)(19,24,27,20)(21,29,31,25)(26,28,32,30)(33,34,38,40)(35,36,42,44)(37,39,47,46)(41,43,45,48)(1,2)(3,9)(4,8)(5,6)(7,11)(10,15)(12,13)(14,16)(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(2,6)(7,9)(8,12)(14,15)(17,19,22,27)(18,20,23,24)(21,26,31,32)(25,28,29,30)(33,36,38,44)(34,35,40,42)(37,43,47,48)(39,41,46,45)(1,2)(3,7)(4,8)(5,6)(9,11)(10,14)(12,13)(15,16)(17,19)(18,24)(20,23)(21,26)(22,27)(25,30)(28,29)(31,32)(33,36)(34,35)(37,43)(38,44)(39,41)(40,42)(45,46)(47,48) involution — undirected(1,3)(2,7)(4,10)(5,11)(6,9)(8,14)(12,15)(13,16)(17,20,22,24)(18,19,23,27)(21,30,31,28)(25,32,29,26)(33,37)(34,39)(35,41)(36,43)(38,47)(40,46)(42,45)(44,48)(1,4)(2,8)(3,10)(5,13)(6,12)(7,14)(9,15)(11,16)(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.