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