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