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