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