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