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