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