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