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