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