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