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