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