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