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