One vertex per element, one color per generator, with an edge from x to x·s.
(4,8)(6,7)(10,12)(14,16)(17,18)(19,27)(20,23)(21,30)(22,31)(24,29)(25,32)(26,28) involution — undirected(1,2,5,3)(4,6,8,7)(11,15)(14,16)(17,19,23,29)(18,24,20,27)(21,28,32,22)(25,26,30,31)(2,3)(6,7)(9,10,13,12)(11,14,15,16)(18,20)(24,27)(25,30)(26,31)(1,3,5,2)(4,7,8,6)(9,11,13,15)(10,14,12,16)(17,20,23,18)(19,24,29,27)(21,30,32,25)(22,31,28,26)(9,12,13,10)(11,16,15,14)(17,21)(18,25)(19,28)(20,30)(22,29)(23,32)(24,26)(27,31)(1,4)(2,6)(3,7)(5,8)(17,22,23,28)(18,26,20,31)(19,21,29,32)(24,30,27,25)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.