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