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