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