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)(7,12)(11,16)(14,15)(18,24)(21,22)(25,38)(26,39)(27,36)(28,41)(30,35)(32,42)(33,37)(40,44)(43,48)(45,46) involution — undirected(3,11)(7,15)(10,16)(12,14)(17,18,23,27)(19,28,31,25)(20,32,34,39)(21,24,22,36)(26,37,42,33)(29,44,47,48)(30,38,35,41)(40,46,43,45)(1,3,6,11)(2,7,9,15)(4,12,5,14)(8,16,13,10)(17,19,23,31)(18,25,27,28)(20,29,34,47)(21,35,22,30)(24,38,36,41)(26,40,42,43)(32,48,39,44)(33,46,37,45)(1,4,6,5)(2,8,9,13)(3,12,11,14)(7,16,15,10)(17,20)(18,26)(19,29)(21,33)(22,37)(23,34)(24,39)(25,40)(27,42)(28,43)(30,45)(31,47)(32,36)(35,46)(38,44)(41,48)(17,21,23,22)(18,24,27,36)(19,30,31,35)(20,33,34,37)(25,41,28,38)(26,39,42,32)(29,45,47,46)(40,48,43,44)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.