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