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