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