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