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