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