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