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