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