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