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