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