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