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