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