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