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