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