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