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