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