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