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