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