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