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