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