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