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