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