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