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