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