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