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