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