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