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