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