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)(19,30)(20,34)(21,27)(22,28)(23,29)(24,39)(25,33)(26,35)(31,45)(32,43)(36,41)(37,44)(38,42)(40,47)(46,48)(1,3)(2,6)(4,7)(5,8)(9,10)(11,15)(12,14)(13,16)(17,19)(18,25)(20,31)(21,36)(22,38)(23,33)(24,32)(26,40)(27,45)(28,43)(29,30)(34,41)(35,48)(37,47)(39,42)(44,46) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,20,23,21)(18,26,29,44)(19,31,33,36)(22,35,24,37)(25,40,30,46)(27,39,34,28)(32,47,38,48)(41,43,45,42)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(17,21,23,20)(18,27,29,34)(19,31,33,36)(22,35,24,37)(25,41,30,45)(26,39,44,28)(32,48,38,47)(40,43,46,42)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,22,23,24)(18,28,29,39)(19,32,33,38)(20,35,21,37)(25,42,30,43)(26,27,44,34)(31,47,36,48)(40,41,46,45)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.