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)(21,25)(22,26)(23,30)(28,41)(29,42)(31,45)(32,38)(33,39)(34,40)(35,43)(36,44)(37,46)(47,48) involution — undirected(1,3,5,11)(2,6,7,15)(4,13,14,10)(8,16,12,9)(17,19,22,28)(18,23,26,35)(20,31,32,29)(21,30,34,43)(24,37,38,36)(25,27,40,41)(33,46,47,44)(39,45,48,42)(1,2)(3,6)(4,8)(5,7)(9,10)(11,15)(12,14)(13,16)(19,28)(20,32)(21,34)(23,35)(24,38)(27,41)(39,48)(44,46) involution — undirected(2,7)(6,15)(8,12)(9,16)(17,20,22,32)(18,24,26,38)(19,29,28,31)(21,33,34,47)(23,36,35,37)(25,39,40,48)(27,42,41,45)(30,44,43,46)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.