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