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