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