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)(19,22)(20,25)(21,24)(23,28)(26,30)(27,32)(29,31) involution — undirected(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,22,18)(20,25,28,23)(21,26,30,24)(27,32,29,31)(1,3,5,4)(2,7,8,6)(10,13)(11,15)(17,20,22,28)(18,23,19,25)(21,29,30,27)(24,32,26,31)(10,13)(14,16)(18,19)(23,25)(24,26)(31,32) involution — undirected(1,3,5,4)(2,7,8,6)(9,11,12,15)(10,14,13,16)(17,21,22,30)(18,24,19,26)(20,27,28,29)(23,31,25,32)(1,4,5,3)(2,6,8,7)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.