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