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