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