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