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