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