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