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