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