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