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