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