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