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