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