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