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