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