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