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