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