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