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