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