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