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)(17,18,23,31,22,20,21,26)(19,27,32,24,28,25,29,30)(1,3,4,7)(2,5,6,8)(10,13)(11,15)(17,19,22,28)(18,24,20,30)(21,32,23,29)(25,31,27,26)(2,6)(5,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,25)(20,27)(21,29)(22,28)(23,32)(24,26)(30,31) involution — undirected(10,13)(14,16)(17,20,23,26,22,18,21,31)(19,27,32,24,28,25,29,30)(9,11,12,15)(10,14,13,16)(18,20)(19,28)(26,31)(29,32)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.