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