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