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