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