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