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