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