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)(11,12)(17,18)(19,25)(20,24)(21,22)(23,26)(27,32)(28,31)(29,30) involution — undirected(2,6)(7,8)(9,10)(11,16)(12,15)(13,14)(18,22)(19,26)(20,27)(24,31)(28,29)(30,32) involution — undirected(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,19,21,26)(18,23,22,25)(20,28,29,27)(24,32,30,31)(1,4,5,3)(2,8,6,7)(9,11,13,12)(10,15,14,16)(17,20,26,28,21,29,19,27)(18,24,23,31,22,30,25,32)(2,6)(7,8)(9,12,13,11)(10,15,14,16)(18,22)(23,25)(24,30)(31,32)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.