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