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