One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,9,12,10,14,8,13)(7,15,17,11,18,19,16,20)(21,22,25,30,26,28,24,29)(23,31,34,27,32,36,33,35)(1,2,3,4)(5,7)(6,11)(8,17)(9,16)(10,18)(12,15)(13,19)(14,20)(21,23,26,32)(22,27,28,35)(24,34,25,33)(29,36,30,31)(5,7)(6,11)(8,16)(9,17)(10,18)(12,19)(13,15)(14,20)(22,28)(24,25)(27,35)(33,34) involution — undirected(5,8,10,9)(6,12,14,13)(7,16,18,17)(11,19,20,15)(23,32)(27,35)(31,36)(33,34)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.