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