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