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