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