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