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