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