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