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