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