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