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