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