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