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