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