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