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