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