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