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