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