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