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