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