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