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