One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,8,5,7,13,15)(3,9,10,16,11,6,12,14)(17,18,22,28,23,26,38,44,24,29,36,46,20,35,21,27)(19,30,33,43,31,45,32,40,34,47,37,25,39,41,48,42)(1,3,5,11)(2,6,7,9)(4,12,13,10)(8,16,15,14)(17,19)(18,25)(20,31)(21,37)(22,32)(23,39)(24,34)(26,40)(27,45)(28,30)(29,43)(33,38)(35,42)(36,48)(41,44)(46,47)(2,7)(6,9)(8,15)(14,16) involution — undirected(17,20,24,23)(18,26,29,35)(19,31,34,39)(21,36,38,22)(25,40,43,42)(27,28,44,46)(30,41,47,45)(32,37,48,33)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.