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)(17,18,23,22)(19,25,20,24)(21,26,29,30)(27,32,28,31)(33,34,38,39)(35,41,42,36)(37,45,46,40)(43,44,48,47)(4,11)(8,14)(10,15)(12,16)(17,19,23,20)(18,24,22,25)(21,28,29,27)(26,32,30,31)(33,35,38,42)(34,36,39,41)(37,43,46,48)(40,44,45,47)(2,7)(3,9)(8,14)(10,15)(34,39)(35,42)(40,45)(43,48) involution — undirected(1,3)(2,5)(4,10)(6,9)(7,13)(8,12)(11,15)(14,16)(17,20,23,19)(18,25,22,24)(21,28,29,27)(26,32,30,31)(33,34)(35,36)(37,40)(38,39)(41,42)(43,44)(45,46)(47,48)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,21)(18,26)(19,27)(20,28)(22,30)(23,29)(24,31)(25,32)(33,36)(34,35)(37,44)(38,41)(39,42)(40,43)(45,48)(46,47) involution — undirected(1,5)(2,3)(4,12)(6,13)(7,9)(8,10)(11,16)(14,15)(17,22,23,18)(19,25,20,24)(21,26,29,30)(27,31,28,32)(33,37,38,46)(34,40,39,45)(35,43,42,48)(36,44,41,47)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.