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