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