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