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)(11,14)(12,13)(15,16)(17,18,22,25)(19,23,20,27)(21,24,29,31)(26,30,28,32)(1,3,4,8)(2,5,6,7)(19,26)(20,28)(21,29)(23,30)(24,31)(27,32)(10,13)(14,16)(17,19,22,20)(18,23,25,27)(21,28,29,26)(24,32,31,30)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(3,8)(5,7)(17,20,22,19)(18,23,25,27)(21,26,29,28)(24,32,31,30)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.