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