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