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