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