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