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