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