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