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