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