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