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