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