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