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