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