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