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