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